2. what is driver of printer?

Driver of printer is an software interaction between printer and computer.
Software printer support computer can be communication with printer by USB cable. Computer will be odered printer perform printed page and the status of printer will show on the smart panel (status windows) of computer as well as display the error message. For example: Toner low, Toner empty, Toner exhausted, LSU error, Fuser error, Scanner error …

3. Install driver of Epson WorkForce Pro WF-3620 printer guide

Step 1: Extract the file driver

Installation guide driver Epson printer

Step 2: Perform with 1 in 2 the way: StartDevices and Printers or Control PanelHardware and SoundDevices and Printers

Installation guide driver Epson printer

Step 3: Click mouse to “Add a printer”

Step 4: Waiting until the “Add printer” windows shown on and click mouse to “Add a local printer”
Step 5: On the Choose a printer port page (attenion: choose port that printer in use correctly), and then click Next.

Installation guide driver Epson printer

Step 6: On the “Install the printer driver”, choose “Epson” and finding the printer name correctly.

Installation guide driver Epson printer

If you don’t find it, you should press to “Have disk” and then Browse to file .inf (driver printer downloaded)

Installation guide driver Epson printer

Step 7: Wait to finally and click to “Finnish” to complete installation driver for your printer.